Revert of Revert of Support GLSL es 3.00

src/gpu/gl/GrGLContext.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLContext.h"
 
 ////////////////////////////////////////////////////////////////////////////////
@@ skipping 29 matching lines @@
             if (GR_GL_INVALID_VER == fGLVersion) {
                 return false;
             }
 
             if (!GrGetGLSLGeneration(interface, &fGLSLGeneration)) {
                 return false;
             }
 
             fVendor = GrGLGetVendor(interface);
 
+            /*
+             * Qualcomm drivers have a horrendous bug with some drivers. Though they claim to
+             * support GLES 3.00, some perfectly valid GLSL300 shaders will only compile with
+             * #version 100, and will fail to compile with #version 300 es.  In the long term, we
+             * need to lock this down to a specific driver version.
+             */
+            if (kQualcomm_GrGLVendor == fVendor) {
+                fGLSLGeneration = k110_GrGLSLGeneration;
+            }
+
             fRenderer = GrGLGetRendererFromString(renderer);
 
             fIsMesa = GrGLIsMesaFromVersionString(ver);
 
             fIsChromium = GrGLIsChromiumFromRendererString(renderer);
 
             // This must occur before caps init.
             fInterface.reset(SkRef(interface));
 
             return fGLCaps->init(*this, interface);
         }
     }
     return false;
 }
 
 bool GrGLContextInfo::isInitialized() const { return SkToBool(fInterface.get()); }
 
 void GrGLContextInfo::reset() {
     fInterface.reset(NULL);
     fGLVersion = GR_GL_VER(0, 0);
     fGLSLGeneration = static_cast<GrGLSLGeneration>(0);
     fVendor = kOther_GrGLVendor;
     fRenderer = kOther_GrGLRenderer;
     fIsMesa = false;
     fIsChromium = false;
     fGLCaps->reset();
 }